Roll grinding machine



May 27, 1941. c. 5. FLYGA 2,243,335 ROLL GRINDING momma I Filed July 12, 1940 s sheetswsheet i I 22 i 5 a 6 v 1o ,2. H 2 N A 5\ v s2 s2? 33 3s 5 3w "9!--- 5? EHRL. 5P1. YEHRE May 27,1941. c. ca. FLYGARE ROLL zenmviue mom}:

Filed July 12, 1940 3 Sheets-Sheet 2 4 E W m2 m no. r L R m 5. um

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y 1941- c. G. FLYGARE 2,243,336 I ROLL GRINDING MACHINE 3 SheetsSheet 3 Filed July 3.2, 1940 Patented May 27, 1941 UNITED ST'E 2,243,336 ROLL GRINDING MACHINE Carl G. Flygare, Worcester, Mass, assignor to Norton Company,

Worcester, Mass,

tion of Massachusetts Application July 12, 1940, Serial No. 3 15;187

(Cl. til-95) 6 Claims.

operation.

One object of the invention is to make a simple and thoroughly practical finishing or polishing attachment for a roll grinding machine. A further object of the invention is to provide ing attachment for thereon.

A further object of the inventionis to provide a polishing attachment for a roll chine which is adjustably mounted on the grindnism uniformly to finish the periphery of a crowned roll.

A further object of the invention is to provide a roll polishing attachment in Which the grinding wheel slide is rocked toward and from the part pointed out hereinafter.

e invention accordingly consists in the features of construction, combinations of elements,

a roll grinding machine embodying this invention;

Fig. 2 is a cross-sectional view through the View, taken approximately on the line 4-4 of Fig. 3;

Fig. 5 is a fragmentary sectional view, taken approximately on the line 5-5 of Fig. 3, showing the mounting for the roll finishing attach- Fig. 6 is a fragmentary sectional View, on an a, corporaenlarged scale, showing nism'for the table.

the hand traverse mecha- H is provided with a rotatable Work support comprising a motor driven headstock i6 and a footstock H. The headstock i6 and footstock I? are provided with Work supporting centers 18 and i9, respectively,

finished. The be mounted on the centers mon roll it may l8 and it, as is compractice in the art, or if the roll is very head 22 is connected by a pair of aligned studs or trunnions 23 arranged on opposite sides of the wheel head 22, and which are supported on a transversely movable wheel slide 24. The wheel This mechanism may comprise a half nut 25 depending from the under side of the transversely mov- The half nut 25: meshes with or mates with a rotatable feed screw 2? which is in the base either toward or from the work piece or roll 26. In the grinding of cylindrical rolls for a rolling mill, it is frequently necessary to produce a roll which is not a true cylinder, having a peripheral surface which is formed either with a concave or convex crown, such as a deflection curve or otherwise according to the requirements of the rolling mill. In the machine as illustrated in the drawings, the form or crown on the roll 2% is produced by rocking the wheel head 2 about its supporting pivot 23 relative to the transversely movable intermediate slide i as the roll 28 and the wheel head 22 are reciprocated longitudinally relative to each other.

The work supporting table ii is reciprocated longitudinally relative to the base it! and the wheel head 22 to traverse the roll 2t being finished past the operative face of an abrading element to be hereinafter described. The table ii is provided with a depending rack bar 35 by which the table ll may be traversed by a manual or a power traversing mechanism, such as that shown in the prior U. S. patent to Norton No. 162,838 dated June 1%, 1904. This mechanism has not been shown in detail, since it is not considered to be part of the present invention. Reference may be had to the above-mentioned patent for details of disclosure not contained herein.

A gear 36 meshes with the rack bar 35 (Fig. 6) and is mounted on a rotatable shaft 31. A gear 38 which is mountedon the outer end of the shaft 31 meshes with a gear 33 rotatably mounted on a shaft it which also supports a manually operable traverse wheel ii. By rotation of the traverse wheel M, a rotary motion may be imparted to the gear 3% and through the rack 35 to traverse the work supporting table ll longitudinally relative to the base H3.

The table I 1 may be reciprocated longitudinally by a power operated mechanism, as shown in the prior patent above referred to. This mechanism may comprise a rotatable power driven shaft t2 which is driven by a multiple speed drive contained within a casing 23, details of which have not been shown in the present case, since they are not considered to be part of the present invention. For details of this mechanism, reference may be had to the above-mentioned prior patent. The rotatable shaft 52 is operatively connected through a clutch mechanism and a gear mechanism to impart a reciprocatory movement to the rack bar 35 and the table H. This table driving mechanism has not been illustrated in detail, since it is not considered to be a part of the present invention. For details of disclosure not contained herein, reference may be had to the above prior patent to Norton.

In order to provide a predetermined rocking motion of the wheel spindle 2i to rock the abrading element toward and from the axis of the roll 2!), it is desirable to provide a mechanism to time the rocking movement of the abrading element with the longitudinal relative reciprocation between the abrading element and the roll 218 to be finished. This is preferably accomplished by means of the gear 4:5 which meshes with the table rack 35 so that when the table I l is moved longitudinally, a rotary motion is imparted through the gear 45 to a shaft ii. The rear end of the shaft il is provided with a gear 59 which meshes with a gear 5i mounted on a rotatable shaft 52. The shaft 52 also carries a gear 53 which meshes with a gear 55 mounted on a rotatable shaft 55. The shaft 52 and the gears 5i and '53 carried thereby are supported by a swinging arm 53 which is rotatably supported on the shaft 'l. This permits the gear 5 to be changed when dewheel spindle sired and the gear 53 to be swung into mesh with the gear ad and locked in mesh therewith by means of a clamping screw 5i which passes through the arm 56 and is screw threaded into a portion of the base iii. The left-hand end of the shaft 55 is preferably formed as a splined shaft 89 which passes through a correspondingly shaped aperture in a worm Bl which is rotatably upported in a gear casing E2.

The casing 82 is rigidly fixed to the transversely movable wheel slide it. The worm El meshes with a worm gear .53 mounted on a transverse shaft 6 which is journalled in suitable bearings in the gear casing 62. The shaft 64 supports a cam 55 which is arranged to engage a rotatable follower roller 56 which is supported on a stud ET. The stud 6? is rotatably supported in bearings in a bracket $58 which is rigidly fixed to the pivotally mounted wheel head 22. The gear casing E2 is provided with an upwardly projecting stop surface it which is arranged to be engaged by an adjustable screw it which is screw threaded into a bracket E2 passing through the rear end of the rocking wheel head 22. If it is the wheel head 22 against a rocking motion, the screw 'il may be adjusted to raise the rear end of the wheel head 22 so that the fol- 56 is raised from operative engagement with the cam 65, so that even though the cam E5 is rotated by the longitudinal movement of the work table ll, no rocking or oscillating movement will be imparted to rock the wheel head 22. This mechanism is illustrated in detail in my prior U. S. Patent No. 2,132,941 dated October 11, 1938, to which reference may be had for details of disclosure not contained herein,

The wheel spindle 21 may be normally rotated by means of an electric motor mounted on the upper surface of the wheel head 22. The motor 811 is provided with a driving pulley 8! which is connected by means of V-belts 82 with a pulley 83 mounted on the end of the wheel spindle. If it is desired to grind the roll, a grinding wheel (not shown) may be mounted on the other end of the M in a manner similar to that shown in my prior U. S. Patent No. 2,132,941.

After the roll 2% has been ground to the required and predetermined extent, it is desirable to provide a suitable finishing or polishing mechanism for producing a highly refined or polished surface on the roll. This is preferably accomplished by the provision of a roll polishing or finishing attachment whereby a non-rotatable abrading element may be employed for the final finishing operation. is provided which is supported on a portion 91 of the wheel spindle mally supports the grinding wheel) and is held in adjusted position thereon by means of a nut 93.

tapered end The attachment 52 is provided with a rearwardly extending arm 94 (Fig. 3) which is provided with a clearance hole 95 through which passes a stud 95. mounted on the side of the housing 91 formed integral with or fixedly mounted on the pivotally mounted wheel head 22. Opposed adjusting screws 9'! and 98 are screw threaded through a portion of the arm 9% and are arranged to engage the stud 95 on diametrically opposite sides thereof. By manipulation of the screws 97 and 98, the attachment 5i! may be adjusted to a slight angular extend and the attachment 20 may be locked so as to hold the spindle 2| against rotation during the polishing operation.

I The forward end of the bracket Bills yoke- A polishing attachment 9!] 2! (which nor-' shaped-comprising the spaced arms I66 and IOI which serve as supports for a pair of vertically arranged aligned studs I02 and I 03, The studs I I32 and H33 are preferably supported in anti-friction which are carried by the arms I 65 and IGI, respectlvely, of the I33 serve as a support for a substantially U- which in turn supports a normally stationary lapping or abrading element, such as a wheel I 07. The wheel IIl'I (Fig. 4) is supported by a Wheel center I88 having an integral flange flange ms is threaded Onto the other end of the aperture H4 in the wheel center I 08 and through I 5 in the side plate H9. A binder nut I I5 is screw threaded onto a threaded porrespectively, are preferably formed as slots (Fig. 3) to facilitate a transverse adjustgauge rod I 20 is slidably mounted to an aperture I2I in the stud I02.

a gauge surface I22 which is accurately aligned with the axes any rotary motion of the spindle 2!.

rod I26 is inserted in the aperture I2I position illustrated in Fig. 3. loosened and the into the The nut H6 isthen the crowned contour of the roll 20 to 'be polished, thus of this improved readily apparent ioll finishing from the foreadjustment of and 98.

element in I 20 is then to move the abradmg element I claim: 1. In a roll grinding machine having a base, a longitudinally reciprocable able work uniform engagement with the crowned surface of the roll being lapped.

2. In a 011 grinding machine having longitudinally reciprocable work table, able work support on said table, a transversely then be admovable slide, a wheel head pivotally mounted on said slide, a rotatable wheel spindle on said head, and a roll lapping attachment comprising a frame adapted to be supported by said spindle, a yoke-shaped end on said frame, a substantially U-shaped frame, pivotal connections between the yoke and said U-shaped frame, the axisv of said pivot being at substantially right. angles to the axis of said spindle, a lapping element on said frame, and means to adjust said lapping element relative to said frame in a direction normal to the spindle axis so that the operative face of the lapping element may be aligned with the pivotal axis of said frame.

3. In a cylindrical grinding machine having a rotatable wheel spindle, a lapping attachment comprising a frame adapted to be mounted on said wheel spindle, means to hold said frame and spindle against rotation, a lapping element holder supported by said frame, pivotal connection between said frame and holder, the axis of the pivotal connections being at right angles to the axis of said spindle, and a non-rotatable lapping element onsaid holder.

4. In a cylindrical grinding machine having a rotatable wheel spindle, a roll lapping attachment therefor having a frame adapted to be supported on said spindle, means to clamp said frame and spindle against rotation, a lapping element holder supported by connections between said frame and said holder, and a non-rotatable lapping element on said said frame, pivotal holder having its operative face aligned with the axis of said pivotal connections.

5. In a cylindrical grinding machine having a rotatable wheel spindle, a lapping attachment therefor having a frame adapted to be mounted on the wheel spindle, means to clamp said frame and spindle against rotation, a lapping element holder supported on said frame, pivotal connections between said frame and holder, the axis of said pivotal connections being at substantially right angles to the axis of said spindle, a non-rotatable lapping element on said holder, and means to adjust said lapping element relative to said holder to align its operative face with the axis of said pivotal connection.

6. in a cylindrical grinding machine having a rotatable wheel spindle, a lapping attachment therefor having a frame adapted to be supported on the wheel spindle, means to hold the frame and spindle against rotation, a yoke-shaped end on said frame, a substantially U-shaped frame, pivotal connections between said yoke and said U-shaped frame, the axis of said pivotal connections being at substantially right angles to the axis of said spindle, a lapping element on said frame, andimeans including a gauge to facilitate adjustment of the lapping element relative to the U-shaped frame to align its operative face with the axis of said pivotal conneotions.

CARL G. FLYGARE. 

